Secure the BPD Control Room
Unlike the Bat, Harley Quinn just doesn’t do stealth. You’ll notice this pretty quickly upon entering the control room. This area is made up of two floors, with a large tower of monitors stacked high in the center of the spacious area. The area is being actively patrolled by 12 police officers, and has various wires, low walls, and ledges to traverse between. There’s even a few grates and vents you can make use of should you choose. Once you enter the room you’ll be prompted to use Harley’s Mayhem Mode on the guards here.
Mayhem Mode is a special ability exclusive to Harley that powers up her strength and agility and turns every attack into a brutal takedown. It’s a useful skill that you can utilize both in hand-to-hand combat or when getting the jump on a group of enemies. In order to use Mayhem Mode you first have to eliminate several enemies to build the meter up. Once the meter is full you can activate it at any time you choose and let loose on up to four enemies back-to-back.
Because Harley Quinn isn’t stealthy you’ll have to hit the cops here hard and fast. There isn’t one specific strategy that will always work, but your best bet is to play Harley like Batman on speed: strike fast and leave the area just as quickly, over and over again.
The best method for clearing a room as Harley is to leap up to a ledge, walk or skip across some wires/scaffolding, pounce behind an unsuspecting cop as he passes and then use a Loud Takedown with his back turned to eliminate him. Once he’s down for the count leap to higher ground before anyone else can find you. Rinse, repeat. Conversely you can pounce attack a cop in a similar way, and then use a ground takedown while they’re seeing stars. Harley doesn’t have a grappling hook, and must rely on her acrobatics to get away from attacks if she’s spotted. Be mindful of this.
Never approach a group of armed guards unless you’re ready to enter Mayhem Mode, and if the situation ever gets hairy Harley can use her laughing gas as a distraction so you can leap to the nearest ledge. Break the sight of enemies similar to how you would as Batman to get away. You’ll know you’re in the clear when Harley makes a shushing noise and then giggles.
Harley’s Psychosis Mode is useful here, as it works the same way as Batman’s Detective Vision. It’s crucial to use when figuring out how many officers are around you, and any breakable walls or grates.
After you’ve taken care of the cops you’ll need to head back to the tower of monitors to track down where Ivy is being held. Harley discovers Ivy in the basement of the police department, which she’ll need to access from the BPD’s entrance lobby. Leap up to the second floor and follow the waypoint to your destination.
